ATPL网上题库4飞行原理 下载本文

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正确答案:C

(42)How can the pilot increase the rate of turn and decrease the radius at the same time?

? ? ?

A.Steepen the bank and increase airspeed. B.Steepen the bank and decrease airspeed. C.Shallow the bank and increase airspeed.

正确答案:B

43)How can turbulent air cause an increase in stalling speed of an airfoil?

? ? ?

A.An abrupt change in relative wind. B.A decrease in angle of attack. C.Sudden decrease in load factor.

正确答案:A

(44)What is the relationship of the rate of turn with the radius of turn with a constant angle of bank but increasing airspeed?

? ? ?

A.Rate will decrease and radius will increase. B.Rate will decrease and radius will decrease. C.Rate and radius will increase.

正确答案:A

(45)Which condition would INITIALLY cause the indicated airspeed and pitch to increase and sink rate to decrease?

? ? ?

A.Sudden increase in a headwind component. B.Sudden decrease in a headwind component. C.Tailwind which suddenly increase in velocity.

正确答案:A

(46)Which of the following is not the way of increasing MCRIT in jet transport designs?

? ? ?

A.Give the wing a lower camber. B.Increase wing sweep. C.Add slats.

正确答案:C

(47)Within what Mach range does transonic flight regimes usually occur?

? ? ?

A.0.50 to 0.75 Mach B.0.75 to 1.20 Mach C.1.20 to 2.50 Mach

正确答案:B

(48)At what Mach range does the subsonic flight range normally occur?

? ? ?

A.Below .75 Mach. B.From .75 to 1.20 Mach. C.From 1.20 to 2.50 Mach.

正确答案:A

(49)What is the free stream mach number which produce first of local sonic flow?

? ? ?

A.supersonic Mach number B.transonic Mach number C.critical Mach number

正确答案:C

(50)What is the highest speed possible without supersonic flow over the wing?

? ? ?

A.critical Mach number B.initial buffet speed C.transonic index

正确答案:A

(51)Which maximum range factor decrease as weight decrease?

? ? ?

A.Airspeed. B.Angle of attack. C.Altitude.

正确答案:A

(52)Which maximum range factor increases as weight decreases?

? ? ?

A.Angle of attack. B.Altitude. C.Airspeed.

正确答案:B

(53)What should a pilot do to maintain \airplane performance when a headwind is encountered?

?

A.Increase speed.